Incandescent electric-lamp connection



' p 1,626,983 May J. H. SULLIVAN INCANDE SCENT ELECTRIQ LAMP CONNECTIONFiled April 21. 1926 Inventor Patented May 3, 1927.

UNITED STATES PATENT OFFICE.

OF PORTAGE, VVISGOITSIN".

r'n'oAnnnscnn'r ELECTRIC-LAMP connncrron.

Application iiimi April 21, 1926. Serial No. 103,593.

My present. invention has to do with the mounting or connection triclamps and more of incandescent elecparticularly to the mounting orconnection of such lamps in reflectors used in autoin obile headlights,and

it contemplates the provisionof a connection which 18 simple, compactand reliable and durable in service the other practical advantageshereinafter ascribed to it. To the attainment invention consists inhereinafter described and is possessed of of the foregoing, the theimprovement as and definitely claimed.

In the accompanying drawings, forming part of this specification Figure1 is a view, partly in section and partly in elevation,

illustrative of the best 'practical embodiment-of my invention that Ihave as yet devised.

Figure 2 is a detail elevation taken from the viewpoint indicated by theline 2-2 of Figure 1.

Figure 3 is a fra mentary cross-section taken in the plane in mated bythe line 3-3 of Figure 1;

Similar numerals of corresponding parts in the drawings. I showinFigures 1 characterized by .a central reference designate all of theviews of and aperture 2 and having at its inner side an annulus 3 aboutsaid aperture and also having at its outer side a boss 4 which surroundsthe aperture,

the annulus being equip cally opposite slots 5, also show in Figure 1trio lamp 6' which may of cohventional type, the usual filament 7.

ed with diametr Figures 1 and 3. I an incandescent elecbe and preferablyis and s provided with The lamp bulb 6 is joined in any appropriatemanner to a stem 8 which is dielectric in character and which,

for the sake of strength and durability is formed of fiber or equivalentmaterial; the

filament 7 having its end in and carried through t metrically ortionsembedded which extend to the rear end of the stem, Figure 1. The saidgrooves 9 .arefor the reception of electric. wires 10 designed to bearranged in circuit with a suitable source of electric energ and it willbe noted from Figure 1 that t e wire position by screws 11 make electricconnection between the fila ment 7 and the wires noted that the rear'pors 10 are clamped in which contact and 10. It will also be tion of thestem 8 is ception of a nut 12 3 a reflector 1;:

estemSto dia-- opposite longitudinal grooves reduced and exteriorlythreaded for the rewhich is provided with an annular extension 13 inwhich are spaced notches 14, said'notches 1a being to seat a cotter pin15 which extends through the stem 8 and serves to lock the ,nut, 12 tothe said stein, after the manner best shown in Figure 2.

It will be appreciated from the foregoing that my improvement iscompact, simple and inexpensive, and that all of the parts that enterinto the connection are. rigidly fastened to the reflector. Moreover itwill be noted that my improvement is susceptible of being easilyfabricated or assembled,fand that it is devoid of any connections suchas are liable to become loose.

It will be appreciated from that the slots formed in the annulus 3 aresufliciently deep to permit of the lamp being placed in or adjusted topro er focus.

' I have entered into a detailed description of the present andpreferred embodiment of my invention in order to impart an exactunderstanding of the said embodiment in all of its details. I do notdesire, however, to be understood as limiting myself to the precisestructure and arrangement disclosed, my invention being defined by myappende claims within the scope of which modifications may be madewithout departure from my invention. I

Having described my invention, what I claim and desire to secure byLetters-Patent, 1s:- 0

1. In combinatiom'a reflector having an aperture and an annulus aboutthe aperture and in the reflector and also having a boss about theaperture at the outer side of the reflector, the said annulus beingcharacterized by diametrically opposite slots, a dielectric stemarranged in said aperture of the reflector and having pins disposed insaid slots and also' having opposite longitudinal grooves for receivingelectric conductors and a threaded rear portion, a lamp ulb joined tosaid stem, a filament-in the bul and having portions extending throughthe stem, screws for connecting said conductors to the stem andefiecting electric connection between the conductors and the filament, anut mounted on the stem and disposed in rear of the boss on thereflector and having a notched extension, and a cotter in extendingthrough the stem and seate in notches of the nut extension.

the foregoing 2. In combination, a reflector having an aperture and anannulus about the aperture and in the reflector and also having a bossabout the aperture at the-outer side of the reflector, the said annulusbeing characterized by diametrically opposite slots, a dielectric 'stemarranged in said aperture of the reflector and having pins disposed insaid slots and also having opposite longitudinal grooves for receivingelectric conductors and a threaded rear portion, a lamp bulb joined tosaidstem, a filament in the bulb and having portions extending throu hthe stem, means for connecting sald con motors to the stem and efiectingelectric connection between the conductors and the filaments, and a nutmounted on the stern and disposed in rear of the boss on the reflector.

3, In combination, a reflector having an aperture and an annulus aboutthe aperture and in the reflector and also having a boss about theaperture at the outer side of the reflector, a dielectric stem arrangedin said aperture of the reflector, means between the annulus and thedielectric stem to prevent the rotation of the dielectric stem in the annulus, said dielectric stem having opposed longitudinal grooves forreceiving electric conductors and a threaded rear portion, a lamp bulbjoined to said stem, a filament in the bulb having portions extendingthrough the stem, means for connectin said conduct-ors to the stem andefiectmg electric connection between the conductors and thefilaments,and a' nut mounted on the stem and disposed in rear of theboss on the refiector.

In testimony whereof I aliix my signature.

JQSEIFH lI-IARQLD SULLIVAN,

